Loss of rotation torque and violent swing vibrations on your SY500H mean internal motor block fatigue. Blown cylinder faces drop holding pressures, causing dangerous carriage drift on steep slopes.
Item NO.:
640401Order(MOQ):
1Payment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANLead Time:
2-3 DAYSSecure fluid slewing power with this heavy-duty SY500H M5X250 swing motor cylinder block. Matching 640401, this premium rotor group ensures stable torque multiplication for heavy mining equipment.

| Part Number | 640401 / M5X250 |
|---|---|
| Part Name | Swing Slewing Motor Cylinder Block Rotor Group Component |
| Compatible Brand | Tongmyung |
| Applicable Models | SY500H, SY465H Heavy Mining Excavators |
| Application | Excavator hydraulic system |
| Material | High‑strength Alloy Steel |
| Product Color | Matte Steel Grey |
| Working Temperature | -25°C to 115°C |
| Key Function | Rotational Kinetic Energy Conversion and Mechanical Swing Braking Fluid Containment |
| Condition | 100% New, Aftermarket / OEM Quality |
| Packaging | Wooden Case/Reinforced Carton/Neutral Packing / Customized Box |

Maintain absolute axial piston alignment under intense lateral torque forces during uphill slewing.

Resists high-velocity fluid erosion to prolong overall service limits across multi-shift mining projects.

Reduce internal pressure drop losses to maximize overall hydraulic energy efficiency and cut fuel burn.


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